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- W2053642786 abstract "Manganite thin films showing colossal magnetoresistance, large resistance change at the metal-to-insulator (M-I) transition temperature and high spin polarization, are promising candidates for a new generation of electronic devices including magnetoresistive sensors, bolometers and spin-valve systems [1 Venkatesan, T. 1998. Phil. Trans. R. Soc. Lond. A, 356: 1661 [Google Scholar], 2 Pannetier, M., Fermon, C., Le Goff, G., Simola, J. and Kerr, E. 2004. Science, 304: 1648[Crossref], [PubMed], [Web of Science ®] , [Google Scholar], 3 Nowas, E. R., Merithew, R. D., Weissmann, M. B., Bloom, I. and Parkin, S. S. P. 1998. J. Appl. Phys., 84: 6195 [Google Scholar]]. Among them, ferromagnetic La1 − x Sr x MnO 3 with x ∼ 0.3 (LSMO) attracts especially great attention due to its high Curie temperature value (T C ) of about 360 K, thus creating expectations for the realization of magnetic devices operating at room temperature. To study, understand and reduce the noise level of those compounds is a huge challenge. Here we report detailed investigations of 1/f electrical noise in structures patterned in epitaxial thin films of a large bandwidth La 2/3 Sr 1/3 MnO 3 (LSMO) deposited on (100) SrTiO 3 substrates. The 1/ f noise, which dominate along the whole range of frequencies studies, was observed not to follow the overall temperature dependence of the resistivity as shown by other LSMO film in literature [4 Rana, D. S., Ziese, M. and Malik, S. K. 2006. Phys. Rev. B, 74: 094406 [Google Scholar]]. Moreover no significant dependence of the 1/f noise with the temperature (above 300 K) could be observed, which seems to be in favor of a non magnetic origin of this noise. On the other hand at very low temperature (below 300 K-see pictures shown below), the application of a small magnetic field (i.e. 80 gauss) drives a very important change in a Lorentzian-like behavior appeared in our spectra. Although a direct correlation between noise and magnetoresistance can not be found out on our devices, a real discussion is open on the origin of this electrical fluctuation insight the Ferromagnetic state." @default.
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- W2053642786 date "2008-11-14" @default.
- W2053642786 modified "2023-10-18" @default.
- W2053642786 title "Low Frequency Noise in High TC Ferromagnetic La2/3Sr1/3MnO3 Devices: Study of Anomalous Effects Below Curie Temperature" @default.
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- W2053642786 doi "https://doi.org/10.1080/00150190802397783" @default.
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